Rockwell Automation Publication 7000-UM202H-EN-P - November 2023 175
Appendix A Preventative Maintenance Schedule
• Carry out the insulation resistance testing of the drive, motor,
isolation transformer/line reactor, and the associated cabling.
• Refer to Insulation Resistance Test on page 197
for insulation
resistance testing procedure.
• Check clamp head indicator washers for proper clamp pressure, and
adjust as necessary.
Refer to Checking Clamping Pressure
on page 88 for details on proper
clamp pressure.
Control Power Checks (No Medium Voltage)
1. Apply control power to the drive, and test power to all of the vacuum
contactors (input, output, and bypass) in the system, verifying all
contactors can close and seal in.
2. See publication 1502-UM050
for a detailed description of all contactor
maintenance.
3. Verify all single-phase cooling fans for operation.
4. This includes the cooling fans in the AC/DC Power supplies and the DC/
DC converter.
5. Verify the proper voltage levels at the CPT (if installed), AC/DC power
supplies, DC/DC converter, isolated gate power supply boards.
6. Verify the proper gate pulse patterns using gate test operating mode.
For drives with SPS boards installed, use the test power harness
(80018-695-51) to power the rectifier SGCT boards.
7. If there have been any changes to the system during the outage, place the
drive in system test operating mode and verify all functional changes.
Final Power Checks before Restarting
1. Ensure all cabinets are cleared of tools, and all component connections
are back in place and in the running state.
2. Put all equipment in the normal operating mode, and apply medium
voltage.
3. If there were any input or output cables removed, verify the input
phasing, and bump the motor for rotation.
4. If there were any changes to the motor, input transformer, or associated
cabling, you will have to retune the drive to the new configuration using
autotuning.
5. Save all parameter changes (if any) to NVRAM.
6. Run the application up to full speed/full load, or to desired satisfaction.
7. Capture the drive variables while running, in the highest access level if
possible.
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